libcap: import from packages feed

Having libcap in OpenWrt base allows us to enable libcap support in
other packages in base.

In lldpd, this would allow the monitor process to drop its privileges
instead of running as root, improving security. It will also allow us to
drop our patch to disable libcap.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>

package/libs/libcap/Makefile

@@ -0,0 +1,116 @@
+#
+# Copyright (C) 2011 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=libcap
+PKG_VERSION:=2.43
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_URL:=@KERNEL/linux/libs/security/linux-privs/libcap2
+PKG_HASH:=512a0e5fc4c1e06d472a20da26aa96a9b9bf2a26b23f094f77f1b8da56cc427f
+
+PKG_MAINTAINER:=Paul Wassi <p.wassi@gmx.at>
+PKG_LICENSE:=GPL-2.0-only
+PKG_LICENSE_FILES:=License
+
+PKG_INSTALL:=1
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+define Package/libcap/Default
+  TITLE:=Linux capabilities library
+  SECTION:=libs
+  CATEGORY:=Libraries
+  URL:=https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/
+endef
+
+define Package/libcap/description/Default
+  Linux capabilities
+endef
+
+define Package/libcap
+  $(call Package/libcap/Default)
+  TITLE += library
+endef
+
+define Package/libcap-bin
+  $(call Package/libcap/Default)
+  TITLE += binaries
+  DEPENDS += libcap
+endef
+
+define Package/libcap-bin/description
+  $(call Package/libcap/description/Default)
+  .
+  This package contains the libcap utilities.
+endef
+
+define Package/libcap-bin/config
+  if PACKAGE_libcap-bin
+  config PACKAGE_libcap-bin-capsh-shell
+    string "capsh shell"
+    help
+      Set the capsh shell.
+    default "/bin/sh"
+  endif
+endef
+
+MAKE_FLAGS += \
+    BUILD_CC="$(CC)" \
+    BUILD_CFLAGS="$(FPIC) -I$(PKG_BUILD_DIR)/libcap/include" \
+    CFLAGS="$(TARGET_CFLAGS)" \
+    LD="$(TARGET_CC) -Wl,-x -shared" \
+    LDFLAGS="$(TARGET_LDFLAGS)" \
+    INDENT="| true" \
+    GOLANG="no" \
+    PAM_CAP="no" \
+    RAISE_SETFCAP="no" \
+    DYNAMIC="yes" \
+    lib="lib"
+
+ifneq ($(CONFIG_PACKAGE_libcap-bin-capsh-shell),)
+TARGET_CFLAGS += -DSHELL='\"$(CONFIG_PACKAGE_libcap-bin-capsh-shell)\"'
+endif
+
+TARGET_CFLAGS += $(if $(CONFIG_USE_MUSL),-Dpthread_yield=sched_yield)
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include/sys
+	$(CP) $(PKG_INSTALL_DIR)/usr/include/sys/*.h $(1)/usr/include/sys/
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/lib/libcap.{so*,a} $(1)/usr/lib/
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/lib/libpsx.a $(1)/usr/lib/
+	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/lib/pkgconfig/libcap.pc $(1)/usr/lib/pkgconfig/
+	$(SED) 's,exec_prefix=,exec_prefix=/usr,g' $(1)/usr/lib/pkgconfig/libcap.pc
+	$(SED) 's,/lib,$$$${exec_prefix}/lib,g' $(1)/usr/lib/pkgconfig/libcap.pc
+	$(SED) 's,/usr/include,$$$${prefix}/include,g' $(1)/usr/lib/pkgconfig/libcap.pc
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/lib/pkgconfig/libpsx.pc $(1)/usr/lib/pkgconfig/
+	$(SED) 's,exec_prefix=,exec_prefix=/usr,g' $(1)/usr/lib/pkgconfig/libpsx.pc
+	$(SED) 's,/lib,$$$${exec_prefix}/lib,g' $(1)/usr/lib/pkgconfig/libpsx.pc
+	$(SED) 's,/usr/include,$$$${prefix}/include,g' $(1)/usr/lib/pkgconfig/libpsx.pc
+endef
+
+define Package/libcap/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/lib/libcap.so* $(1)/usr/lib/
+endef
+
+define Package/libcap-bin/install
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(CP) $(PKG_INSTALL_DIR)/sbin/capsh     $(1)/usr/sbin/
+	$(CP) $(PKG_INSTALL_DIR)/sbin/getcap    $(1)/usr/sbin/
+	$(CP) $(PKG_INSTALL_DIR)/sbin/getpcaps  $(1)/usr/sbin/
+	$(CP) $(PKG_INSTALL_DIR)/sbin/setcap    $(1)/usr/sbin/
+endef
+
+$(eval $(call BuildPackage,libcap))
+$(eval $(call BuildPackage,libcap-bin))

package/libs/libcap/patches/300-disable-tests.patch

@@ -0,0 +1,10 @@
+--- a/Makefile
++++ b/Makefile
+@@ -17,7 +17,6 @@ ifeq ($(GOLANG),yes)
+ 	$(MAKE) -C go $@
+ 	rm -f cap/go.sum
+ endif
+-	$(MAKE) -C tests $@
+ 	$(MAKE) -C progs $@
+ 	$(MAKE) -C doc $@
+ 	$(MAKE) -C kdebug $@